Chair frame



FIG. 1 is a perspective view showing the top, sides and front of a chair frame which forms my new design, the broken lines of other parts of a chair in this and other figures being for illustrative purposes only and forming no part of my design;

FIG. 2 is a top plan view thereof;

FIG. 3 is a rear elevational view thereof;

FIG. 4 is a left side elevational view thereof, this side and the opposite right side elevational view being mirror images;

FIG. 5 is a front elevational view thereof; and,

FIG. 6 is a bottom plan view thereof. 

The ornamental design for a chair frame, as shown and described. 